Legs broken after ban on jewellery (7)
I believe the answer is:
bangles
'jewellery' is the definition.
(I know this)
'legs broken after ban' is the wordplay.
'broken' indicates an anagram.
'after' says to put letters next to each other.
'legs' is an anagram of 'gles'.
'gles' after 'ban' is 'BANGLES'.
'on' acts as a link.
(Other definitions for bangles that I've seen before include "Baubles, - - , and beads" , "Ornaments" .)